The theme picker chip's thumbnail loader hardcoded `.svg`
filenames (`spades_ace.svg`, `back.svg`) — a holdover from when
every shipped theme was vector-art. Raster-art user themes (e.g.
the v0.19 pixel-art theme generated via Claude Design and dropped
into ~/.local/share/solitaire_quest/themes/rusty-pixel/) had real
PNGs in their directory but the picker rendered placeholders
because it never tried the PNG sibling.
The fix is scoped to the thumbnail-cache pipeline. In-game card
rendering already worked via Bevy's standard PNG asset loader on
manifest-declared face/back paths — only the picker's small
preview chip was affected.
Changes in solitaire_engine/src/theme/plugin.rs:
- PREVIEW_FACE_FILENAME / PREVIEW_BACK_FILENAME (with embedded
`.svg` suffix) replaced by PREVIEW_FACE_BASENAME /
PREVIEW_BACK_BASENAME ("spades_ace" / "back"). The function
appends the extension itself.
- read_theme_preview_svg_bytes -> read_theme_preview_bytes
returns ThemePreviewBytes::{Svg, Png}. For "default" the
embedded table stays SVG-only. For user themes the function
tries `<basename>.svg` first (matching the bundled
convention) and falls back to `<basename>.png` second.
- rasterize_preview_to_handle gains a Png branch that calls a
new decode_png_for_thumbnail helper (Bevy's
Image::from_buffer with ImageType::Format(ImageFormat::Png)).
PNGs decode at native dimensions; the picker chip's UI
layout scales them at draw time. SVGs continue to rasterise
at the fixed 100x140 thumbnail size as before.
- generate_thumbnail_pair_for is unchanged in shape; just
threads the new enum through.
Tests:
- read_default_theme_preview_returns_some_for_canonical_files
updated to match the new function signature and assert on
the Svg variant explicitly.
- New png_only_user_theme_generates_real_thumbnails creates a
temp theme dir, writes a 2x3 PNG (encoded at runtime via the
`image` dev-dep so the bytes are guaranteed valid), and
asserts both ace + back yield non-default Handle<Image>.
Cleans up the temp dir afterward.
solitaire_engine/Cargo.toml: image = "0.25" added as a
dev-dependency for the test's runtime PNG encoding. Already a
transitive Bevy dep so the build graph is unchanged.
Workspace: 1171 passing tests / 0 failing, was 1170 (+1 new).
cargo clippy --workspace --all-targets -- -D warnings clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Settings → Cosmetic's theme picker showed only the theme name. Now
each chip carries a small Ace-of-Spades + back preview pair so the
player can see what each theme looks like before switching.
A new ThemeThumbnailCache resource keys per-theme by id and stores
two Handle<Image>s (ace + back) rasterised at thumbnail resolution
via the existing rasterize_svg path. Generation runs once per
theme registration in theme_plugin; subsequent picker re-spawns
just look up the cached handles. Themes that lack one of the
preview SVGs (broken user theme) get a Handle::default() placeholder
rather than crashing — the placeholder renders as a transparent
rectangle the same size as the missing thumbnail.
The picker chip spawn loop in settings_plugin reads the cache and
renders the pair as two child sprites above the chip text. The
selected-theme chip's existing STATE_SUCCESS tint sits behind the
thumbnails; contrast stays readable.
Asset-source plumbing in assets/sources.rs and assets/mod.rs picks
up the new bytes-loading helper that the thumbnail generator uses
for embedded:// theme assets at startup time (before AssetServer is
fully initialised).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Themes already shipped a back.svg in their manifest but card_plugin
ignored it — face-down cards always rendered with the legacy
back_N.png picker, so swapping themes only swapped the faces. Now
the active theme's back rasterises alongside its faces and feeds
into the face-down sprite path; the legacy back_N.png picker remains
the fallback when a theme doesn't ship its own back (e.g. a
user-imported theme that only redefines faces).
theme/plugin.rs caches the active theme's back Handle<Image> in the
ActiveTheme resource on theme-load and theme-switch. card_plugin's
face-down branch reads ActiveTheme first; missing theme back →
legacy back_N.png path indexed by Settings.selected_card_back.
Settings → Cosmetic's card-back picker section gains a caption
("Active theme provides its own back") that surfaces when the
override is in effect, plus the swatch row dims to communicate the
read-only state. Settings file format unchanged — selected_card_back
still round-trips and only takes effect when the theme leaves the
back undefined.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Wires the runtime theme system (CARD_PLAN.md phases 1–7) into the
visible Settings UI so a player can switch between every theme
discovered by `ThemeRegistry` without restarting.
solitaire_data/src/settings.rs
Settings gains `selected_theme_id: String` (default "default"),
guarded by `#[serde(default = "default_theme_id")]` so existing
settings.json files deserialize cleanly.
solitaire_engine/src/settings_plugin.rs
- SettingsButton::SelectTheme(String) variant + focus order 85.
- sync_settings_panel_visibility now reads
Option<Res<ThemeRegistry>>, snapshots id+display_name pairs, and
threads them into spawn_settings_panel. When the registry is
absent (tests under MinimalPlugins) the picker silently skips —
every existing test continues to pass unchanged.
- theme_picker_row helper: like picker_row but keyed by String
rather than usize, with chips wide enough for theme display
names. Attaches the canonical tooltip ("Choose card-face
artwork. Imported themes appear here.") and the FocusRow marker
so Left/Right arrows cycle within the row.
- Click handler updates settings.selected_theme_id, persists, and
fires SettingsChangedEvent — same shape as every other picker.
solitaire_engine/src/theme/plugin.rs
- load_default_theme renamed to load_initial_theme; reads
SettingsResource on Startup and seeds ActiveTheme from
settings.selected_theme_id (falling back to embedded default).
- react_to_settings_theme_change watches SettingsChangedEvent,
no-ops when the active theme already matches, and otherwise
swaps ActiveTheme — the existing
sync_card_image_set_with_active_theme system then refreshes
every card sprite on the next AssetEvent::LoadedWithDependencies.
cargo build / clippy --workspace --all-targets -- -D warnings / test
--workspace all green (960 passed, 0 failed, 9 ignored).
Implements Phase 4 of CARD_PLAN.md — the runtime hook that loads the
default theme on startup and refreshes the card-rendering pipeline
whenever the active theme changes.
solitaire_engine/src/theme/plugin.rs
ThemePlugin
init_asset::<CardTheme>, register_asset_loader for SvgLoader and
CardThemeLoader, Startup load_default_theme, and Update
sync_card_image_set_with_active_theme.
ActiveTheme(Handle<CardTheme>)
Resource pointing at the currently-loaded theme.
set_theme(commands, asset_server, theme_id)
Public API for switching themes — formats the URL as
`themes://<theme_id>/theme.ron` and updates the resource.
Integration approach: rather than refactor every `card_plugin.rs`
spawn site to read from `Assets<CardTheme>` directly, the sync system
writes the theme's face/back image handles into the existing
`CardImageSet` resource on `AssetEvent::LoadedWithDependencies` /
`Modified`, then fires `StateChangedEvent`. The existing
`sync_cards_on_change` pipeline rebuilds card sprites from the new
handles on the next tick — observable behaviour matches the plan's
intent (theme switches propagate immediately) while keeping
card_plugin's 1929-line surface area untouched.
Theme.back is mapped onto `CardImageSet.backs[0]` (the default-back
slot xCards previously occupied); `backs[1..=4]` are the
asset-generator patterns and remain user-selectable independent of
the active theme.
Added to solitaire_app/main.rs as `add_plugins(ThemePlugin)` after
`AssetSourcesPlugin` so the asset sources are registered before the
default-theme load is dispatched.
6 new tests covering suit/rank index mapping (matching the
`card_plugin` doc-commented `[suit][rank]` layout), empty-theme
no-panic, back-slot overwrite, and the URL format from `set_theme`.
cargo build / clippy --workspace --all-targets -- -D warnings / test
--workspace all green (950 passed, 0 failed, 9 ignored).
funman300